Apparatus for autogenous metal-working.



'W. BRANDES. APPARATUS FOR. AUTOGENOUS METAL WORKING,

APPLICATION FILED NOV. 18, 1909.

1'. performed therewith.

UNITED STATES 'Rg T N'r oF IcE.

WILHELM BRANDES, or GOTTENBORG, swnnnn.

APPARATUS ron AUTOGENOUS METAL-WORKING.

Specification of Iletters Patent.

- Patented Oct. 24, 1911..

Application filed November 18 1909. Serial No. 528,790.

To all wlwm it may concern.

. subject of the King ofSweden, and resident Be it known that I, VVILHELM Bimrmns, a

' of Gottenborg, Swedemhave invented cergtain new and useful Improvements'in Ap-. paratuses for Autogenous Metal-Working,

of which the following is a specification, The invention relates to liquid and gaseous fuel burners, and especially to a combined blow pipe and mixing tube; and has for its several objects,-First, to provide a gas mixing and burning device, whereby the mixing of the gases may be so regulated and applied that the operations of metal welding and metal severing may be advantageously Second, to provide a device. of the character stated, having interchangeable nozzles whereby various thicknesses of metal may be advantageously treatedf Third, to provide means for" at: taching the nozzles whereby said means will not affect the flow of gas from the nozzles, and -whereby the attaching means is not detrimentally affected by the heat from the 4 lene gas, or any of the gases well-known innozzles. Fourth, to provide means in connection with the foregoing for preventing the conduction of excessive heat into the main body of-the blow pipe. These objects are attained by the mechanism hereinafter described, reference being had to the accompanying drawings forming part of the application, and in which similar characters designate similar parts throughoutthe several views.

Figure 1 is a longitudinal sectional view of the body portion of the device, a portion at the right-being broken off; Fig. 2 is a sectional view of an interchangeable nozzle. Figs. 3 and {t are fragmental sections of modifications having other nozzles attached thereto.

This invention consistsin a device, comprising a body portion 1, a feed duct for oxygen-gas 2, and a second feed duct for proper combustible gas, which may be acetythe art. The ducts 2 and 3 are substantially.

" parallel with each other. The duct 2 constitutes ab anch of the oxygen gas duct 2, being substantially at right angles thereto,

and communicating therewith through .a valve 7' which is controllable by the screw 7 for interrupting said. communication when desirable. The branch 2'- is surrounded by an annular portion 8 of a mixing chamber and an annular nozzle 9 the said nozzle and chamber merging with each other.'- Said annular portion also merges with the 'elongated portion ofthe mixing chamber 3'- which is contiguous to the duct 3- A branch 5 comprises a port perpendicular to the duct 2 andcommunicates therewith, extending in 3 i the direction of the combustible gas duct 3/ Extending into the duct 3, is a nozzle portion 5 at rightangles to the said branch,

effectually accomplished when the oxygen gas is intimately mixed with the combustible gas. In welding, it is also essential that the It is also known that welding metal with a gas flame is most flame be relatively large and shall heata relatively large surface, whereas in the operation of severing, the effective flames should be small, forceful and intensely hot.

It is obvious, however, that when such a flame, as last described, is directed on a cold metallic body of considerable thickness, the heat conducting properties of said body will render the process tedious. If, however, a welding flame be first applied and the metal preheated and relatively softened thereby,

the small intensely hot flame then forcefully applied, the metal will be easily pierced by the last said flame, and by a gradual movement thereof across the said body, the same maybe slotted or severed.- The two flames described, are provided by the present invcntion, and may be employed eitherseparately tor simultaneously as follows: If a welding flame is desired, the valve 7 is closerhthe valve 6 is opened, by means of the screws 6, and the oxygen gas is admitted through the branch 5 and nozzle 5 into the portion 3"of'the mixing chamber. Oxygen gas from the nozzle 5 enters an end of the duct 3 with considerable velocity and creates a draft which carries combustible gas therewith into the portion 3, where it is partially mixed with the combustible gas in the primary mixing chamber 3', and in the annular recess 8 from whence it makes exit through the annular combustion nozzle 9, 'where combustion takes effect.

In welding metals of different-character and thickness, different degrees of temperature and different sizes of flame are emli l ployed, as provided for by the use of suit- ,able and interchangeable nozzles. For example, if desired to admit'relatively more of the oxygen gas, the valve 7 is opened and a mixing nozzle 10 is attached, whereupon oxygen gas is emitted through the port 11 and thence through the chambers 12 and 13 and the combustion nozzle let, while simultaneously the intimately mixed gases from the secondary chamber 8 and nozzle 9 enter the chamber 12 and begin mixing with' the said oxygen gas while entering expanded chamber 13, wherethe mixing is continued untilsaid gases are-finally consumed by the flame at the nozzle 14.

It is obvious that if a larger and less force- I tul flame is desired, the nozzle 14 may be removed, whereupon the mixinglnozzle 10' constitutes a combustion nozzle; and if a smaller. and more forcefulflame is desired, a smaller interchangeable combustion nozzle as 14, Fig. '2, may be. applied. It is also obvious that the relative proportionsof gases may be regulated by adjustment of the valves 6 and 7'.

When it is desired to use this blow pipe for severing metal, the port- 11 is preferably,

temporarily closed by meansof the screw- 7, and a flame first employed, as for welding heretofore described, until the metal has become softened. thereby; whereupon the valve 7 is opened and the pure oxygen gas is applied forcefully through the port 11, producing'an intense and concentrated flame which pierces the metal, and whereby slot ting orsevering may be accomplished as heretofore described.

It is desirable, in severing and slotting, to vary the size of the flame according to the character and thickness of metals. Therefore interchangeable nozzles, as 15 and 15 having ports 11, 11 of various sizes, may be fitted to the body member 1 as shown in Fig. 4. It is evident that the construction of the device may be modified to conform with Fig. 3, and with various other modifi-' cations within the scope of the principles involved, whereby the relative sizes of theflames may be varied. I

-.bustible g'asfduct, a nozzle onsaid branch communicatingwith said combustible gas duct, and a mixing chamber centrally alined with the combustible gas duct and communicatingwith the latter, said mixing chamber com risin an annular 'ortion havin an extension terminating in an annular nozzle, I

said oxygen gas duct having a branch at one end extending through said annular portion *and communicating with ;a relatively small oxygen gas nozzle.

2. 'In a blow pipeya-body port1on having an oxygen gas duct therein, a combustible gas duct substantially parallel with said oxy en gas duct, said oxygen gas duct having a ranch extending toward the combustible gas duct, a nozzle on said branch centrally alined with and communicating with said combustible gas duct, and a mixing chamber centrally alined with the combustible gas duetxand communicating with the latter, said mixing chamber comprising an annular portion having an extension ter- -minating in an annular nozzle, said oxygen gas duct having a branch at one end extending through said annular portion and communieating with a relatively small oxygen gas nozzle.

3. In azblow pipe, a body portion having an oxygen gas duct therein, a combustible gas duct parallel with said oxygen gas duct,

said oxygen gas duct having a branch extending toward the combustible gas duct, a nozzle -on sa1d branch commumcatmg with said combustible gas duct, and a mixing chamber comprising an elongated portion I and an annular portion, said elongated por' tion being centrally alined with the combustible gas duct and communicating with the latter, salid'annular portion of the mixing chamber having an extension at substantially right'angles to the said elongated portion and terminating-in an annular nozzle, said oxygen gas duct having a branch at one end extending through said annular portion and communicating with a relativelysmall oxygen gas nozzle.

4:. In a blow pipe, a body portion having an oxygen gas duct therein, a combustible gas duct substantially parallel with said oxygen gas duct, said oxygen gas duct having a branch extending toward ,the combustible gas duct, a nozzle on said branchcommunicating with said combustible gas duct, and a mixing chamber centrally alined with the combustible gas duct and communicating with the latter, said mixing chamber comprising an annular portion having an extension out.of alinement with said elongated portion-and terminating in an annular nozzle, said'oxygen gas duct having a branch at one end thereof extending through said annular portion and communicating with a relatively small oxygen gas nozzle. A a

v 5. In a blow pipe, a body portion having an oxygen gas duct. therein, a combustible gas duct substantially parallel with said l z z I l oxygen gas duct, said oxygen gas duct having a branch extending toward the combustible gas duct, a nozzle on said branch communicating with said combustible gas duct, a primary mixing chamber centrally combustible gas duct and communicating with the latter, said mixing chamber comprising an annular portion having an extension terminating in an annular nozzle, said oxygen gas duct having a branch at one end extending through said annular portion and communicating with a relatively small oxygen gas nozzle, and a secondary mixing chamber communicating with the annular nozzle and with the oxygen gas nozzle, said secondary mixing chamber communicating with a combustion nozzle.

(5. In a blow pipe, a body portion having an oxygen gas duct therein, a combustible gas duct substantially parallel with said oxygen gas duct, said oxygen gas duct having a branch extencllng toward the combustiblegas duct, a nozzle on said branch communicating with said combustible gasduct, a primary mixing chamber centrally alined with the combustible" gas duct and communicating with the latter, said mixing chamber comprising an annular portion haying an extension terminating'in an annular nozzle, said oxygen gas duct having a branch at one end extending through said annular portion and communicating with a relatively small oxygen gasvnozzle, and

a secondary mixing chamber communicating with the annular nozzle and with the oxygen gas nozzle, said mixing chamber communicating with a combustion nozzle through an expanded chamber.

7. In a blow pipe, a body portion having an oxygen gas duct therein, a combustible gas duct substantially parallel with said oxygen gas duct, said oxygen gas duct hav- V ing a branch extending toward the combustible gas duct, a nozzle on said branch co'mmunicating with said combustible gas duct, :1 primary mixing chamber centrally alined with the combustible duct and communit-ating with the latter, said mixing chamber comprising an annular portion having an extension terminating in an annular nozzle, said oxygen gas duct having a branch at one end extending through said annular portion and comnninicating with a relatively small oxygen gas nozzle, a secondary mixing chamber nozzle and with the oxygen gas nozzle, said secondary mixing chamber communicating with a combustion nozzle, and a water jacket sin-rounding the annular nozzle.

In testimom whereof I have hereunto set my hand in presence of two witnesses.

VVILHELM BRANDES.

Witnesses:

BENJ. BOTHMEX, E. Jonxson.

con'in'xunicating with the annular 

